Immunizations and Antibiotics for Overseas Travel: Most immunizations are not required under International Health Requirements but are recommended. Anyone lacking certain region- or country-specific immunizations may be denied entry into or exit from a country.
Yellow Fever Yellow fever is an infectious disease transmitted by the bite of an infected Aedes mosquito. Symptoms and signs of yellow fever include high fever, jaundice, headache, backache, nausea, and vomiting. Treatment focuses on supportive care for pain and fever control.